org.textmining.extraction.word.WordExtractorFactory.java Source code

Introduction

Here is the source code for org.textmining.extraction.word.WordExtractorFactory.java

Source

/*
 * Textmining.org text extractors
 * 
 * Copyright (C) 2008 Benryan Software Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */
package org.textmining.extraction.word;

import java.io.IOException;
import java.io.InputStream;

import org.apache.poi.poifs.filesystem.*;
import org.apache.poi.util.LittleEndian;
import org.textmining.extraction.word.model.*;

public class WordExtractorFactory {

    byte[] _header;
    POIFSFileSystem _fsys;
    protected boolean _fastSaved;

    protected void initWordHeader(InputStream in) throws IOException, PasswordProtectedException {
        _fsys = new POIFSFileSystem(in);
        // load our POIFS document streams.
        DocumentEntry headerProps = (DocumentEntry) _fsys.getRoot().getEntry("WordDocument");
        DocumentInputStream din = _fsys.createDocumentInputStream("WordDocument");
        _header = new byte[headerProps.getSize()];

        din.read(_header);
        din.close();

    }

    protected int getVersion() throws PasswordProtectedException {
        int info = LittleEndian.getShort(_header, 0xa);
        _fastSaved = (info & 0x4) != 0;
        if ((info & 0x100) != 0) {
            throw new PasswordProtectedException("This document is password protected");
        }
        // determine the version of Word this document came from.
        int nFib = LittleEndian.getShort(_header, 0x2);
        return WordVersion.getVersion(nFib);

    }

}